Question about hand grinders

I currently have a Timemore C2, and I'm looking to get a new hand grinder. I was initially planning to get a ZP6, but after reading through some posts here, ZP6 seems to be more focused on lighter roasted coffee, and (maybe, as far as my interpretation of the posts I've read goes) it tends to be a little bit lackluckster on medium to darker roasts. I mostly get light roast beans and really enjoy tea-like cups, but I also get medium to dark roasted beans sometimes. So, my questions are a)Is the ZP6 really more focused on lighter roasts? b)Are there other grinders in a similar price range to ZP6 that are more versatile? c)How much better are the pricier hand grinders compared to Timemore C2?