I have also juiced key limes for a key lime pie before, and I DO think you can tell the difference - but only if you really know what key limes should taste like. Regular limes are equally tasty, IMO. Mixing regular limes with the Key Limes should help with the workload. My suggestion - if you can't find someone to stand behind you and rub your back while you're squeezing all those limes, sit down at the kitchen table and do it.
"Men are like a fine wine. They all start out like grapes, and
it's our job to stomp on them and keep them in the dark until they
mature into something which you'd like to have to dinner."