6.25u spacebar is the standard, so you don’t need to worry about anything not being compatible with that. It doesn’t look like that set includes a 2u shift though, the only extra shift key looks like 1.75u (it’s slightly shorter than the numpad enter key which is 2u tall).
But, if you want a suggestion of something from KBDfans that would work, there’s these two sets, which imo are hideous individually but if you buy both you’d have a full red set and a full yellow set: Set 1 / Set 2. Plus they’re dirt cheap on account of the aforementioned hideousness, less than half the price of a maxkey set to buy both of them.
These maxkey sets are slightly closer though they still don’t include a 1u shift: Gray and blue / White and green