pld1967

I'm going to replace the springs and shocks on my 04 Grand Cherokee. While looking on line for parts, one web site had coil spring seat, or coil spring insulator. Is there a difference? The pictures of each looked the same, but the spring seat was more expensive than the insulator. I would tend to go with the less expensive, there's 207,000+ for mileage, so I'm not looking to spend much.
Thanks, Pete.