Spider, I sent you an email.
Which Motorolas are you using? We use business grade Motorola GP300s and once we worked out harness and helmet issues, we have been in good shape.
In the consumer grade radio world, I also like the Motorolas over the Midlands. The Midlands may have more range but they have less volume than the Motorolas. Most of the current Motorola Talkabouts also have a mini-usb charge port which makes it easy to tie into the car.
One problem with all radios is, range declines as the batteries get weaker. I don't know how much that affects other aspects of the radio but low power means less range.
While lots of teams use mini-din motorcycle kits or even surveillance kits, many of those accessories look the same. I have cut open a few different motorcycle kits and some have no shielding and not really any insulation either. The sound quality is worse on those.
As an exercise in futility, I converted a few of the dirt cheap kits off Amazon to NASCAR. Rewiring most of it with better wire, the difference was significant.
I did get feedback that using ear buds, even with the typically quiet Midlands, resulted in good volume. For the first time ever, they actually turned the radios down. So running ear buds does help make the radios easier to hear.
Personally, I prefer helmet speakers. I think some are louder than others but I haven't done any scientific comparisons. I did do a seat of the ear drums test for overall volume between the Midlands GXT1000s, Motorola MH230R and Motorola GP300 with a set of regular headphones. At full volume in a quiet room, you can hear the Midlands at say a conversational level. The Motorola MH230R was about like a loud conversation and the GP300s were annoyingly loud. At some point I want to use a decibel meter to do a comparison.
Anyway, my experience has been that the consumer grade Motorolas are a bit louder and more user friendly for what we are doing than at least the Midlands. There are other consumer grade radios out there, but Midlands and Motorolas are the most common.
1973 Datsun 240Z