I've watched live professional rugby a handful of times. All at the Principality Stadium, which was called the Millennium Stadium when I last visited, and all when my dad was still hopeful at least one of his daughters would get into the sport (I'm giving you an insight into just how long ago that was).
So, attending the Women's Six Nations clash between Wales and England, I had little else of rugby to compare it to. I don't watch the men play on TV and I don't have the kind of social life where I make it essential to get out with friends to watch a game. The most recent rugby game I've watched, before this, was my nephew playing mini touch rugby.
I will start with a warning: everything you read is coming from someone who doesn't really know much about what was going on technically. I loosely know the rules — try, conversion, line-out etc — but I don't know the ins and outs and I guess you could say that the only judgement I have of whether a team is playing well or not is if they are scoring (which is what England did, a lot).