For maintenance sharpening, you'd likely find the 400/1200 combination more versatile. I have that one, and the '1200' side will initially leave a coarser finish than the grit rating would imply. EZE-Lap claims their hones will gradually settle into a finer finish over time, after working more aggressively at a coarser finish for a while. I've noticed their '1200', when still relatively new, leaves a scratch pattern similar to DMT's 600 hone. That's a very good or excellent finish for a working edge. And the '400' side would obviously be coarser and could be useful for doing some pretty major repairs to heavily worn or damaged edges, or even for rebevelling tasks on occasion. And a 400-grit working edge, if done well and cleaned up completely, can be a pretty impressive cutting demon for general use.
A 250-grit hone could be useful for very heavy rebevelling & such. But there'd likely not be much need for doing that very often; most knives would likely only need it once or twice over a very long lifetime of use. Beyond rebevelling, I very seldom use anything below ~320 or so; that's about as low as I prefer to go for general-use working edges.