Nope, they are two distinct buttplates.  You can make one fit and vice versa, but they have distinctly different inletting of the buttstock so you could get a gap that might look a bit ratty in some instances when putting a laminate buttplate on a hardwood stock. 

Something like this:

 

WOW! Terrific job bringing back this SKS! BRAVO ZULU!!!!

Are they interchangeable with butt plates on the soviet hard wood stocks?

Did you see this?

https://onlylongrange.com/bn408-408-cheytac/#product-tab-description

That is only a couple of planets away from affordable...but I suppose in a pinch if you needed to open a beer can a mile and a half away....

408 Cheytac... Mark Wahlberg in the movie Shooter had one, he used it to open a can of beans .. cool movie  especially the infamous line "The truth is what I say it is" 

I tried to talk P32 in to something a hair larger..... 20mm
http://www.anzioironworks.com/MAG-FED-20MM-RIFLE.htm

The zipper bursting 20mm next to............. a little 50bmg....  It's the shinizzle for them pesky rabid chipmunks

Oh...so many things I could say about gluttony....or compensation...but hey, size matters and gluttons are happy. Besides, a .30 cal might expand, but that 1/2 inch will never shrink regardless of what it comes out of.  I did dick around with a .58 cal and a 69 caliber muzzle loader for a while... I've been tempted by the 50s, do a .50AE, I have the Desert Eagle already, maybe a 50GI in one of my Glocks, the .500 S&W and even the BMG, I've  come close to doing it... but, oh hell... You ENABLER.. plain and simple..

This is just great, ya had to post the Ron Jeremy rifle...out fricken standing.... Must resist temptation.. there is a Serbu RN-50 36inch heavy barrel for sale locally...  If I'm seen in the obituarys.... No explanation is necessary..and no, ain't none of ya getting my stuff's... I'm taking it all to Vahalla with me

Thank-you, I’m proud to be an enabler. I learned from the best You could mount that Serbu on a Subaru and have a nice suburban tactical