There is the east coast west coast mentality where techniques are quite different. I lived in SoCal until about 6 years ago then moved to Florida. Learning curve is extensive. Spinner are filled with braid but rarely exceeds 30 lb test, where as in Ca a conventional they are braid with 50 lb or higher. I still use my conventional reels for bottom fishing and Blackfin/Yellowfin tuna when they cooperate. But saying one cast further than the other, both need to be in same configuration. Add a good inshore conventional rod & reel with 30 Lb braid and you would be surprised how far it will cast. For any Tuna, the spinning reel loses as i have yet to see a 2 speed that works correctly. Sometimes you really do need the winch effect especially for anything over 100 lbs. Anything under 150 Lbs either will work great. Another difference in coasts is east uses smaller pound test in braid but uses a higher pound test in leader. Example, 20 Lb braid with 50 Lb leader where as on the west it is usually 65 Lb braid with 20 - 50 Lb leader. On the east they also chase their fish as dead boat fishing is really frowned upon so they can use smaller scale line.
Just because the "first" 30 lb fish was an effort, it doesn't necessarily mean later 30+ lb fish will be just as hard. Your technique will adapt and refine along the way as it does with anything else....You will definitely feel more pain with a spinner and I would say need to be stronger than the conventional guy. My biggest gamefish on a spinner was an estimated 30 lb yellowtail and I wouldn't want to do it again and I'm a pretty strong guy.