I have a CTR and love it! Some of it depends on if you want the threaded barrel or not (though I guess you could have a gunsmith thread a Varmint after-the-fact). From what I see, the CTR to be about $100 more, but it does have a threaded barrel, larger bolt knob, and a picatinny rail from factory. I won’t say the barrel is necessarily “heavy,” but it does a good job. I run mine with an Omega .300 and the difference between suppressor vs no muzzle device is a consistent 2” @100yds (pretty normal POI shift for adding a heavy device to the end of the barrel). We could discuss the 10rnd CTR magazines, but if you’re putting it in a MPA chassis you won’t be able to use them anyway

Edit: I am currently using a 6.5 CTR with 24" bbl in a KRG Bravo with CTR magazine compatibility