1. Jennie Garth's last name in WILAY is Tyler; in 90210 it's Taylor.
2. Jennie's first name in WILAY is Valerie, which is the name of her character's nemesis in 90210.
3. In episode 1x7 of WILAY, Jennie's character tells her boyfriend that she had a past fling with a guy named Steve, who was her ex in season 1 of 90210.
4. In episode 1x8 of WILAY, Ian Ziering, who played Steve Sanders on 90210, guest stars.
5. In episodes 3x17, 3x23, and 3x24 of WILAY, Luke Perry, who played Dylan McKay on 90210, guest stars as Todd the plumber.
6. Jennie's character on WILAY hooked up with Luke's character while his girlfriend Brenda was in Paris, which is exactly what happened on 90210.
7. During a flashback in episode 3x17 of WILAY, the 90210 theme song plays in the background.
8. In this flashback, Jennie is wearing the same dress and hairstyle she had at the spring fling on 90210; coincidentally, she is also at a spring fling in WILAY.
9. Also in this flashback, Luke is wearing his signature Dylan high hair and leather jacket.
10. In both WILAY and 90210, Jennie's character was at one time crowned prom queen.
11. In episodes 4x5 and 4x6 of WILAY, Jason Priestly, who played Brandon Walsh on 90210, guest stars.
12. Jennie's character on WILAY briefly dates Jason's character, who mentions that she looks like his sister's best friend from high school, which was true on 90210.
13. Jason's character on WILAY was the editor of his high school newspaper, which was the position Brandon stole from Andrea Zuckerman on 90210.
Those were all the similarities I could come up with. If you think of any more, please let me know, and I'll post them.
