I have the 115MkII, which works fine for practice and small club gigs. MkII has two freely configurable tone print slots but only one of the can be active so I can select 1, 2 or none. As I understand the MkI you can select 1, 2, both or none which is one combination more. Which is better depend on your needs. The BG250 115 sounds fine an is reasonably light and reasonably loud.