Hey Joel, cheers for considering the T10i!
Similarly to the MA750i, the T10i has a lot going for it compared to competitors in the same price bracket, it's a little difficult to compare the two directly, but I'll give you a rundown of the big KSPs for the T10i over the MA750i:
Tuning Filters - It might seem to some a little gimmicky, but it does make a difference to the sound. Personally I switch between the treble and reference fairly regularly and it's nice to have that hint of flexibility in the sound.
Ear hooks - The MA750i's over-ear hooks are heat set and significantly less flexible that the patent pending design of the T10i's. They're both very comfortable, admittedly, but it your ears are unconventionally shaped, the T10i is definitely a bit more adaptable.
Shape - If you're used to the Shures, the T10i's ergonomic fit is definitely more in line with what you're used to. Obviously everyone's ears are different, but the T10i's shape is very comfortable.
I would definitely recommend checking out the reviews of both, they both offer a really good all round package (build, sound, accessories, comfort etc), it's just whether the things that make the T10i that bit more premium are important to you!
Give us a shout if you have any more specific questions.