Having played flats for a few months i decided to try rounds once again. The TONE was to die for - the beauty and the beast in one package. Bright singing slap tones, snarling fingerstyle, great sustain - you know it all. Bandmates immediately noticed how great my tone was and even asked me to keep rounds on.
Nonetheless, I installed flats back during a break and it was worth it. The tone was still seducing, but tamed, mellow, with more bottom, but the most important part was how good did bass and guitar sound together. NO INTERFERENCE at all! Both instruments could be clearly heard, regardless somewhat overpowering bass.
For conclusion, I would recommend rounds if you're selling a bass or playing solo and flats for everything else.
+1
I love how flats fit in the mix.