I can't really say why it didn't occur to me without it having to be pointed out by the Hosts of a WestWorld podcast I've been listening to, but there's actually a really simple (and therefore most likely to be correct) explanation for El Lazo and Lawrence being the same person: being the "master" of Pariah/El Lazo is Lawrence's normal "loop".
	
		
			
		
		
	
				
			 
				 
 
		 
 
		 
 
		 
 
		
 
 
		
 
 
		 
 
		 
 
		