I wasn't really intending it to be an argument. And what I meant is that in terms of actual game play it's the same code. The mameui source doesn't even include the mame source - it's just the UI part, and you have to download the mame source separately. There may be command line options or whatever that don't make sense with mameui, so yes, there may be some differences. I'm just talking about firing up games in a simple way like "mameui32 dkong" vs. "mame dkong". Loadman said "unless he's using mame32" as though that's expected to cause problems. Yes, it's a variable to be considered when there is a problem, but (at least nowadays) there is no reason to think you can't call mameui from a FE and expect it to work.
I'm not saying mala should *recommend* mameui, but to imply that using mameui is problematic and explicitly recommend against it is going overboard IMO. In other words, rather than making it sound like mameui is the cause of the problem right off the bat, say "does the same thing happen using command line mame?"
Again, I really wasn't trying to pick a fight. I just didn't understand why loadman's language was so strong and innocently wondered why. That's all.