They always use EVA foam for their spiders aside from the platinum Homecoming which I believe is rubber, so IMO no. You could glue down the same foam on your suit for free if you have the materials
So on the one suit I purchased from them, I didn't get the attached spider, I got the separate option for a Rubber Spider on the front. This result was great, it's durable and has lasted really well. If you're ordering a suit with a 3D emblem from them I'd recommend spending the extra 5 bucks for the rubber one.
The Spider they put on your suit is the same spider that is on the printed design, That's why the product page says "Order with Spider-Man Suit Only" because they cut the spider from rubber exactly how it's supposed to be on your suit. It is a very acceptable result and if I were to ever order from them again I would totally spring for that option. It adds an extra look to your costume that makes the quality much higher