A bit cumbersome to use paint for this one because the differences are minute.
This Leotay turret features an L44 gun with either the Leopard 2 mantlet, but up-armored (the armor extends more forward and higher than on the Leo2 or Altay) or the Altay mantlet but also up-armored. This Leotay mantlet features a gunners auxiliary sight in the style of the Leopard 2, which is different from the Altay, whose auxiliary sight is situated on top of the mantlet. This either means that the mantlet is a Leo 2 mantlet or a heavily modified Altay mantlet, which borrows the auxiliary sight location of the Leo 2. This Leotay mantlet is so modified that I can't say for sure what its origin is, either the Altay or Leo 2. But I am leaning more towards a modified, up-armored Altay mantlet with the auxiliary sight moved to within the mantlet.
The undersides of the turret front armor follows the outlines of the Altay turret more than the Leo 2 turret. The Leotay turret misses the characteristic Leo 2 indents on the underside of the front cheeks, on both sides of the mantlet.
The weird 'knob' (which I have no idea what its purpose is, could be NBC related??) on the side of the Leotay turret is present on the Altay but not on the Leo 2.
The location of the gunners sight and commander's sight is the same as on the Altay. As well as the RCWS
The location of the hoist-points is the same as on the Altay, albeit a bit different.
The arrangement and amount of smoke grenades are the same as on the Altay.
The position of the APS is the same as on the Altay.
The position of the laser waring systems and 360 degree camera's on the corners of the turret, is the same as the upgraded Altay presented at IDEF '19, but different than the earlier Altay PV-1/2 configuration.
This is enough for me to conclude that this is indeed an Altay turret in origin, though heavily modified with extra front, roof and side turret armor and of course the rest of the sensors and gizmo's.
This turret is still a prototype though, looking at the dummy place holders for the optical sights, the RCWS misses the electro-optical sensors and the radars for the APS are just cosmetic panels. It still needs a lot of work and testing I think. This upgrade is far from being accepted by the army but it does look very promising.
Thanks to
@Stimpy75 for the IDEF '19 photo's of the Altay.