Aquaero 4

Hey guys,

I started a hunt for a used Aquaero, i have been offered an Aquaero 4.

I currently own, run and love an Aquaero LT5, but i dont know anything about the 4.

From what i can read, it has no PWM plugs. Thats not the biggest issue ever, but does anyone know if it runs on the same software as the Aquaero 5 and 6?

Reasons to get it? (If cheaper than a brand new LT5)
Reasons not to get it?

Looks like the Aquaero 4 still uses Aquasuite, but everything I found looks to be a different UI than the 5/6.

That said, it is probably just an older version of the same software on the 4.