Yes, Sebrights and Polish should have the same type of lacing. In fact, Polish were used to create Sebrights.
But often with hatchery birds male Polish aren't up to snuff. You see solid gold or silver hackles and saddles sometimes, and the shoulder patches.
Buff laced is its own thing. I've...
The lacing in Wyandottes and Polish is different. Wyandotte males have the shoulder patches, their saddle and hackle feathers have white lacing on black centers, and their tails are solid black. With Polish, every feather should be laced. But those patches still appear sometimes, especially in...
Looks like a cockerel to me. Or at least the should patches and thick legs are suspicious. Check its comb to see if it is small and pale, or a little bigger and pink/red. That will be the best guide for now.