The Revell of Germany M60A3 is the old (but still the best) Esci M60A3 kit. Italeri has recently reboxed the other two variants of the old Esci M60 series, the M60 Blazer and the M60A1. Esci M60 series came out in the late 1980s (88?) and were vastly superior to the Tamiya or Academy M60 series kits. No one paid too much attention the those kits at the time because Esci M1, M1A1, T-72 and T-74 tanks were real stinkers.
Revell of Germany tends to rebox mainly Italeri and some DML kits in 1:35 scale. They even reboxed the AFV Club M88A1 and included W.German specific fittings (this kit is outstanding BTW). The DML kits they packaged (that I know about) are the BRDM-3, BMP-1, T-72M1, M1A1 and some others that were mainly geared towards their home market (former East German variants). They also reboxed the GAZ-66 trucks that I think were initially Eastern Express kits.
Their original 1:35 scale kits tend to run from decent (Fuchs, Luchs) to excellent (MAN, PzHbzt2000). Their modern Marder 1A3 is also superior to Tamiya's versions.
Their early 1:72 scale kits are really the reboxed 1:76 scale Matchbox kits, but their later 1:72 scale kits are all new and are excellent kits. I highly recommend their newer 1:72 scale kits.
I have no experience with the aircraft kits.