4s reload is very good for versatility. People can barely push you effectively after you shot unless the Type 10 has nowhere to go.
You can kill multiple tanks in quick succession as well.
If you fail to kill, 4s reload helps you quickly kill with a second shot.
The Type 10 also has a much better round (615mm pen instead of just 576mm pen), so it can lol-pen tanks like the Leclerc and some parts of the UFP of the T-80UE-1, and has better spalling as a result of better residual penetration.
The Type 10 has better versatile gun depression (because of suspension control), though Leclerc has slightly better fixed gun depression.
Type 10 has similar overall mobility, though has much better reverse speed.
Type 10 has worse overall turret armour (Leclerc has ~590mm all-around but only 80mm breech armour) but better specific turret armour ( Type 10 has some places around the turret cheeks where it adds up to ~600/~650mm, but others only ~400mm, breech is also better).
The Type 10 does have much worse gun handling and smaller ready rack, though, so I agree with you that the Type 10 is not as great of an all-rounder as something like the Abrams or 2A7V.
I think Leclercs can get into better positions than Leopard 2A7Vs, but they often can’t handle targets nearly as well as 2A7Vs, especially in hull-down positions despite the 5s reload. The 5s reload is nice for flanks though, so I guess you’re right that it really depends on the playstyle.
I think there are quite big differences in performance in some key aspects.
The Abrams have much better APFSDS round, so in a 1v1 against the Leclerc, the Abrams can lol-pen the cheeks of the Leclerc and quite possibly blow up its ammo, or at least damage its autoloader while the Leclerc cannot (and thus has to go for the breech or the turret ring if the Abrams isn’t too careful).
The Abrams can also utilize its better gun depression as well.
The better acceleration of the Leclerc (~26.7 HP/TON vs ~24.5 HP/TON), the lack of NATO hump, and the separate sides for the gunner and commander is nice, but I think in most cases the Abrams is better in terms of overall versatility and for the ‘flanking’ playstyle while still having some capacity to absorb shots from pretty much all top tier MBTs.