Not speaking to the new forks but...
Will a weekend warrior like yourself notice the difference? If set up right, Hell yeah.
Example: My steely 500 suspension has been worked. It is set up to do low speed steep roots, fallen logs, stutter steps etc. with my 220 lb self. Basically to take large slow suspension movements in stride rather than the huge hard hits like landing from a jump. My 16 year old son just took over the bike. He's all of 140 lbs. He's in love with the 500's suspension and doesn't want me to "fix" it for him. He's running into stuff just cringing like it's going to hurt like it does on ALL his previous bikes, and just gets this huge grin when it just sucks them up... and so he picks up the pace and I wait for him less. I give him this summer to be setting a pace I can't keep. Unless I fall off my wallet and "fix" the YZ.
I'd bolt em up and see what happens. Be careful though, badly mismatched front and rear suspension is a recipe for disaster.
Will they _make_ you fast like Scott Summers? No.
Will they let you relax and be more confident? Definitely. That generally translates to faster.