Originally Posted by feliperigby
Is there any real difference 1 or 2 pickups?
You've got a 2nd pickup which is going to give you more/different sounds than just a single pickup.
Or with 1pickup (on 4s and sr5) is basically the same kind of sound that I can achieve?
An SR5 has a 3 way switch, an SR4 does not. Theoretically, an SR5 should be able to give you the same sound that an SR4 can do, plus 2 more due to the switch.
Depending on what year bass you are looking at (SR5's specifically), they may have completely different pickups. SR4's have always had alnico. SR5's had ceramic in them for a long time before switching over to alnico within the last few years.
An SR5 with a ceramic pickup had a lot more in common tonally with a Sterling than a Stingray.