In reply to Sleepy_trucker:
F6b inside or outside? You say your toes aren't to the edge of your shoe which doesn't sound great but are they actually rolling off small holds or are you just avoiding the smaller footholds? If it's indoor then I suspect you're nowhere near the limits of even a poorly fitted shoe.
A big part of using small holds is focusing on keeping the force aligned just right, too much 'in' and you're working your hands too hard, too much 'down' and you're going to skate off it. Too much force in total and you may find a soft shoe rolling or creeping off the hold. In other words you can probably utilise the shoes you have a lot more fully if you want to.
That said, different shoes do work significantly differently on certain types of hold. Switching to a stiff edging shoe can be the difference between getting enough weight on your feet or not for a particular problem. You could get stronger, you could get better but if you've got them in your pack then it can be very tempting to try em
Speaking as someone with climbing shoe mangled toes that hurt to walk on I'd suggest you stick with close fitting comfortable shoes (or at least shoes that quickly break in to a comfortable fit), you have to live with your toes long after you hang up your climbing boots for the last time.
jk