If you go thicker than .084”, it’s definitely going to sound more like a bass. I have a multiscale 8 string that’s 27.5” on the bottom, and I use a .076” for F#/drop E, specifically so it sounds like a guitar. I’ve been up to .090”, which sounds like a bass tuned up that high.
Get ready to experiment with different gauges, and also manufacturers. Once strings are getting that thick in baritone scale lengths, you really start to hear vast differences in thickness and constriction.