Well, in my humble opinion, you need "surf" to make it surfcasting and sand sliding and eroding from under your feet with the wash trying to suck you back down the shingle in white water up to your chest while at the same moment your heaving a bait ( read
lug, rigged eel, live eel, metal, or jig)that must be manipulated in some fashion by your hands which are wrapped around a rod 9 to 10-1/2 feet long.
Where knowing that one wrong move will have you tumbling ass over tea kettle in a cauldron of salt and sand and did I mention it was pitch dark?
Then you look up just in time to see the 7th wave about to break all feathery on top against the starlite, of course in a nano second the stars are gone and you instinctively double over cause here comes that monster cold green heartless wave and you find yourself parralel to the sand digging your rod butt in as the last hope and hope your surf belt is snugged up tight.
And on the other hand you have:
I do a lot of fishing Cuttyhunk style as well and standing on a rock while your corkers have a tenous hold on the slime and bubble weed encrusted rounded top of that boulder and all the while trying and holding your balance by the slimmest of margins where even the task of casting can cause you to loose that erzast balance point and it's dark plus your keeping an eye on that dark shape coming towrd you which turns out to be a roller twice the size of the ones already trying to rip you off that slimy rock and you know you going to go over, no doubt about it now. So it hits and you bail off the rock and ride it hoping for some semblance of sure footing in the ink dark swirling water. Of course you had to walk over oval shaped irregular stones for a half a mile to get to this spot where you slipped and fell twice doing that and you occasionally see the sparks from your corkers grinding against the dry rocks further up the shore.
That could be surfcasting too don't you think?