Sukhoi S-70 Okhotnik UAV

[overscan (PaulMM)]

So pick one:

These are the same radars, and hence Su-57 side array is PESA.
These are the same radars, but the Su-57 uses a different AESA side array not yet shown.
These are different radars.

 

[stealthflanker]

I would say different radar from the position of the guard channel.





Regarding PESA or AESA tho, Russians been using same horn/waveguide end radiators for both their AESA and PESA design. Particularly one designed by NIIP Thikomirov.