I hate this, went in to Guitar Guitar in Newcastle specifically to look at a MB Fusion (I asked for it by name), I was shown to the Aguilar Tone Hammers, because they're "much better than anything GK makes and much, much smaller than those massive GK heads".
I also once fancied an Epifani cabinet, back when they were just starting to get noticed. So I went in and aksed if they could get any into Sounds Live, I knew they weren't a stockist but you never know. I was told that they're fairly sure Epifani don't do bass amps, and why would I downgrade from my Ashdown stack? This was actually a genuine mistake, he'd never heard of Epifani and just couldn't bare to tell me I'd mispronounced 'Epiphone'.