I have one of each, both from a local Cub dealer. Lap bar bought early 2000s, steering wheel about 6 years ago. At the time (guessing) the first was about $3K, second about $5K. Personally I use the older one the most because it's simplicity. Neither have given trouble, I'm thinking older one has 22hp Kohler twin, newer Kawasaki 24hp twin. I'm so used to the lap bar steering it's easy to cut carefully without thinking.
Bang for the buck that's the one I prefer.
Funny story Tractor Supply had a lap bar mower on sale I was going to buy so wife & I could mow. It had a more expensive cloth seat, and asked manager if I could swap seats with a less expensive vinyl one but pay higher price. He said no, it would "void the warranty" so I went down the road a few miles buying steering wheel one from dealer.