I decide finishing my comparison last night because you thinking my comments in the past helping you, and I'm thinking you wanting to know soon my opinion (I understand this feeling). I going to bed very late last night because is your fault!
This is the short answer. The mtw2 and mw07 plus costing the same, 299,00 euros here in Europe. For me the mw07plus is the winner, this is very clear for me.
This is long answer now. The sound is very good in both iems. I speak about this difference in the sound later down in this post. For me the 2 iems offering the best sound in bt earphones, and better than many expensive (bt) headphones. I prefer mw07 sound only a little more.
The problems with mtw2: The battery in the earphones is never 7 hours like sennheiser is saying. I getting 5h 15m or 5h 25m maximum and I don't using ambient or anc modes! With the mw07 plus I getting normally 9 hours or more in the same situation. This is very, very big difference, is almost the double. Master 7 dynamic saying 10 hours and 9 or 9,5 is close with reality, 5 or 5,5 from suppose 7 isn't close with the specifications of sennheiser.
The volume is sometimes not sufficient loud. This is for some classical music or old albums of rock music, is more problematic when the musical moments are quiet. This is more and very important in classical music. For the modern recordings mtw2 is sufficient loud because the music is recorded very loud in 20 or more years.
It is hiss when you using anc with mtw2. This is strange, is very strange because the anc is very, very bad, but even here I hearing hiss!
Anc is terrible. The isolation of the mtw2 is good because the iem is inside in the ears, is designed in this way, is not because anc is on! I have making effort really strong for hearing the difference! I'm using my fan in 4 settings and I finally hear a difference, but the difference is nothing really, isn't obvious, you must paying a lot of attention. The anc isn't real in mtw2 and that is the reality. And, like I saying before, I hearing hiss with the anc on too!
The mtw2 is better buying decision than mtw1, this is obvious. More battery in the earphones and in the case. I can't testing the problem of the battery of the model 1 now with model 2 because I using the model 2 every day, but the improvement is many probable because this is big, big problem with model 1.
The comfort is better too, the earphones little more small, only a little, but this making real difference in experience. With model 1 I having little (not big) pain in outside of my ears after only 30 or 45 minutes and I needing resting after 1,5 hours.
The volume modulation of the mtw2 is better, isn't jumping big steps like model one. And is nice sennheiser making possible you don't tapping by mistake so the action is waiting little more long time for activation. In model 1 sometimes this is little frustration, this mistake the tapping and you are activating something you don't wanting.
Is nice you can changing the functions of the tapping now in at the app, but, and I don't understanding the reason, the equaliser is very bad still, isn't different than in model 1.
The mw07 plus is better for me for this reasons:
The construction is many better, the earphones and the case having really very good quality, you feeling this is very good quality product. The mwt2 isn't feel cheap exactly but isn't sensation of premium construction in the earphones or the case.
The touch buttons in the mw07 plus are outside, isn't tapping. This important aspect after 6 months is big difference, and is one aspect I love completely in this earphones. The sensation is very clear when you putting the volume up or down or you're playing the next or the previous track or you're putting ambient or anc on or off. The buttons isn't make sound or click like you can hearing in mw07 model 1, but in model 2 (plus) is quiet completely, you only feeling very clear what you're activating.
The maximum volume in mw07 plus isn't loud like some iems, but is very clearly more loud than mtw2! For me I never having problems with the maximum volume with mw07 plus in 6 months, never. In the few days with mtw2 yes, sometimes, isn't a lot, but yes, sometimes.
The battery of the mw07 plus is very better than mtw2, this is true in the earphones and in the beautiful design and construction of the metal case. With the mw07 plus you obtaining close of 40 hours like the specifications the manufacturer is saying. With sennheiser you're not obtaining close to 28 hours of the specifications. This is bad for a top of the quality bt earphone, specially when this is the second model!
The sound. The sound of the mtw2 is very, very good, and in my memory isn't different from the model 1, this is very good sennheiser isn't change the sound. But for me the mw07 plus is sounding better, not a lot more better, but yes, better. the mw07 plus is having more instrument separation, and in complicated passage or the music very busy with many instruments this is more evident. But the mwt2 is having a little more big sound and sometimes a little more deep in the stage. I think mtw2 is more exciting in sound for the quick impression specially in pop music, is little more big, but mw07 plus is more accuracy, subtlety and hi-fi, better definition.
The anc of the mw07 plus in my opinion isn'y very good comparing with bt headphones like bose and sony, but when I comparing with mtw2 then mw07 plus anc is very good! This explaining only how I think anc in mtw2 really is, is very terrible.
When I thinking of the complete product, for me the mw07 plus is very clearly the more better iem.
