I'm noticing more similarities between the 2 show since my last comment, here are the ones I've seen:
Heat vision: Adam & Nora.
Speed: Bree & Billy.
Strength: Adam & Hank.
Lightning: Leo (In Parallel Universe), Krane, & Barb.
Telekinesis/Molecular Kinesis: Chase, Phoebe, & Max.
Sibling rivalry (Sister gets sick of brother(s)).
Girl's best friend (Caitlyn & Cherry).
Similar episodes (As mentioned by me before, compare "Mission Invisible" & "Ditch Day").
Similar action (Leo rides Bree to class, Billy speeds off with Nora on top of him).
Billy: Geez Phoebe what've you been eating, cat food?
Phoebe: It was in a can! It said 'Tuna!' I have a lot on my mind OK?!
Principal Perry: Smell that? You know what that is?
Chase: Moist cat food?
Perry: I was running late, I grabbed a can, I thought it was tuna, LIVE WITH IT!!!
Absolelutely, look at the lab rats powers, then look at the thundermans. Nori has adams lazer eyes, billy has brees super speed the dad is strong..... and the MOM HAS LIGHTNING FINGERS LIKE VICTOR KRANE!!!!!
I don't think so, although I've compared the plot of 2 episodes of each show and:
The Thundermans, "Ditch Day" - Max and Phoebe create some fun for themselves on ditch day, but when their superpowers are caught on camera, they must erase the footage before they're exposed.
Lab Rats, "Mission Invisible" - When the kids are caught using bionics on camera, they must recover the evidence before anybody sees it.
a. Thundermans are super heroes lab rats are bionic power people thingy-ma-jig
B. thundermans have a superhero dad and lab rats have scientist dad/step dad
C. the entire thundermans family is fully step relative free yet lab rats has a step relative
d. no one in the thundermans gets along well except Hank and Barb and lab rats gang gets along well