Fsr stands for factory special run, and it means it has some special feature not on the standard line. Often times it's a wood and finish combo that isn't usually on the standards, like ash and a natural finish, compared with poplar or alder.
Don't worry about the price difference. It could be that they need to clear the inventory out and have lowered the price because the fsr wasn't selling. Fender produces new special runs periodically, so the old ones can't be held over forever. With the standards, the line doesn't change year to year, so it doesn't matter if the bass stays in the store for a year or two and the retailer doesn't have to lower the price to move it.
Everything on the two is the same but the wood and finish. Play both, pick what you like and be happy! Your happiness with the instrument shouldn't be connected to how much you paid for it--plenty of experienced players here rock $200 bass all night long at gigs!