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I think it was Trident too, they wanted to scrap Tranche 3 of the Typhoon.
 
1) difference between AESA and PESA in their current state is mainly in +5 Db gain within receiver. All other capabilities are essentially the same.
2) AEGIS can use longer range SM6 and has dedicated SM3 for the high end ABM duties, making it more capable within the system.
3) SPY1 on the high end versions has much better aperture for the radar, making it more capable against low RCS targets.
4) AEGIS ships (cruisers, destroyers) tend to have much better payload.
 
1) difference between AESA and PESA in their current state is mainly in +5 Db gain within receiver. All other capabilities are essentially the same.
2) AEGIS can use longer range SM6 and has dedicated SM3 for the high end ABM duties, making it more capable within the system.
3) SPY1 on the high end versions has much better aperture for the radar, making it more capable against low RCS targets.
4) AEGIS ships (cruisers, destroyers) tend to have much better payload.

1) Not sure I agree with this, I've posted why previously regarding the pros and cons of AESA and PESA.
2) This really depends on the missiles purchased, not the performance of the RADAR itself. It must be remembered though that "Aster 45" (more or less equivalent to the SM3) was/is planned for ABM roles though the programme seems to have been mothballed since priority was given to this mysterious MEADS trinational project of which nobody seems to know much about.
3) Wasn't the large aperture on SAMPSON one of it's distinct features? Can you explain how the SPY1 is more capable in this regard?
4) Again, not strictly relevant to the performance of the RADAR set up.
 
1)Can you link it to me? I am new to this forum and find difficult to read all of the topics.
2)Can you please point me to a better source, on the matter of Aster 45? Is it comparable to SM3 Block II, can it engage targets in near space?
3)Yes it has good aperture, but SPY 1 high end variants are better in that respect.
4)True, but radar is a part of the system. Hence even the best of radars would be worthless if it does not have other systems to support it (extreme case, not really applicable to the full onto the PAAMS system.

Side question - I cannot find a solid reference as to if SAMPSON AESA is fully digital.

P.s. Hence, overall, I believe that AEGIS is superior to PAAMS. That said I am more familiar to Russian systems and thus am not expert on PAAMS.