I have a 2017RZR XP4 1000, I have 20 hours and it’s time to do the first service

I bought a quart of PS-4 oil from the dealer when I got the machine in case I needed to top it off. They said that’s what goes in it

My friend just sold his RZR 900 and gave me a gallon of PS-4 Plus oil
Can I use that in the 1000?
Not sure the difference between the the PS-4 and PS-4 Plus

Here’s a picture of the the quart the dealer sold me and the gallon my buddy gave me

What do you think?

Utah RZR Rentals