Project idea - SB26CDC or T34B in MEH/ATHEX/EXAR

Hello everyone,
I try to read everything here on forum, but I would like to start a thread to ask about your opinions.
I already built some speakers with GRS planar and ribbon tweeters, LX521 and recently 3 way with SB26CDC, U22 and dipole bass. Recentrly i bought T34B and I'm planning to try it in 2 way with @augerpro 8" waveguide. I have MiniDSP Flex 8 with Dirac and Hypex NC502MP 8-Channel amplifier.
I would love to try unity/synergy/meh project with dome tweeters, but I don't know if dome will be as good as compression tweeter for this kind of project. I read Synergy Calc V5 and I thought about pairing it with 3FE25 midranges. Also I'm really struggling to understand the difference between EXAR and ATHEX designs (deifference between them). Can anyone help me with this? :)
Best,
Max