Yes, the DX340 with external battery Pack and enabling DC12V super gain into PB5 do, indeed has similar characteristics of the D16. It may even outperform D16 based on personal preferences, and vice versa.
Either D16 and Dx340 will be an excellent source for being analog source.
I often look at D16 as the Daddy with warmer heart abd thicker personality, more forgiving. The Dx340 is the younger son with more agressiveness, faster attacks and decays, more neutral.
Either one is feeding my PB5 beautifully
For people that love intimidating vocal, timbres, reverberations, decays, D16 is a better choice. For people that love transparency, more modern signatures while still retaining the analogues, the 340 is an amazing choice as it also is an all in 1