Regenyei Blade Comparison

In summary I think Regneyei's own website does a good job explaining the pros and cons of each.
https://regenyei.com/about/flexibility/

Strong: Ok for in club sparring at moderate intensity. Will survive all of your training, not get bent up etc. But not safe for the level of thrusting skill and intensity that people have developed now.

Medium: Good for people who are cutting and bind focused, good for competitive use. Can fence full intensity. Will slowly get bends overtime, but not excessive.

Light: For people who want to thrust as fast as possible, and have light impact, easy to stop. Good for smaller fencers. Limited life, blades will get sets and S curves eventually.

0:00 Intro and Reason
0:45 Strong blade Control
2:01 Strong Blade Flex
3:34 Medium vs Strong
4:54 Medium Flex
5:44 Light