I've flown my 28 against well flown D2's and LS8's. My feeling is
that, at the same wing loading, the 28 has a very slight disadvantage
in climb over the D2 in weak conditions but runs better than either at
high speed.

There's not enough difference in performance to influence the choice.
Other factors may be more important.

I chose the 28 over the LS8 for cockpit design, decent sized main gear
and wheel, and good wheel brake. I'll probably never buy a Ventus or
Discus because the rear visibility for tall pilots is appalling.

Andy