Of course the 100 has more features. $359 vs $229 in the US. Its also 10 lbs. heavier. I love my 50 but I use it as a backup for my Princeton and for jams or rehearsals. If I was limiting to one amp I'd go for the 100 for the features mentioned, non-muted line out and GA-FC usage, but I still would be happy using the 50 for everything, if budget or weight were issues. I've been told I'm too loud with with 5 and 7 piece bands so I don't worry about its volume capability. People like the 100 better when testing side by side in GC, with no band around. But when playing lead with an ensemble the fuller tones they're hearing may not be what's needed.