By engineering, do you mean design, build quality, or a combination of both?

Factory springer design basically peaked in 1991 with the Air Arms TX200. The (?) 2009 Umarex Walther LGV/LGU are in the same bracket. The 2000-vintage Webley Tomahawk and its slightly later little brother the Longbow get an honourable mention for break-barrels, but are less sophisticated inside, and no longer made. Of course, the TXs and Webleys are scope-only in factory trim.

HW95 is a very good choice, but a 1980s HW85 is slightly better in design/quality terms.

HW99S is great. Except when it's not (do a search, including the word "galling").

Don't look down on Dianas. The 34 family are quite good, and worth considering against the 95.

To be honest, my 1950s/60s Diana 35 is better made and finished than the later Dianas, and only slightly under their power (10ish ft-lbs).

There is a lot to be said for a 1970s-80s FWB Sport, a BSF 70, or a 1984-94 Webley Omega.

Which is a long way of saying that a modern 95 is a dratted good gun, but some of the oldies not only match but even beat it.