the style is less of a consideration than the type of instruments you plan on running through the amp.
as far as being a combo, the only real benefit you have is size and ease of transportation. it's not like you can swap out or upgrade components later on. they're very much one trick ponies in a sense.
where they're both bass amps you'll be fine for the low end but some of your highs might not come out as clearly. a keyboard amp is generally better suited for real multipurpose use.
take a look at this for a good multipurpose combo.
Roland U.S. - KC-550: Stereo Mixing Keyboard Amplifier
lots more features, multiple stereo channel inputs, multiple stereo outputs, it's a real workhorse. you can use it on it's own or as a power source within a larger sound system too. might be a little pricier but it seems like a much more versatile unit. if the price is too high they also have a 350 model that might be nicer to your pocketbook.