Not where I live. They are about the same price. Depends on the brand and type of product.
Incidentally... lentil based sausages are horrible on a grill. They downright taste gross when baked. But in a rich vegetable soup? Much better than meat.
Yeah, many plant based alternatives are cheaper than meat to produce, but it has become a thing that vegan alternatives are expensive so everyone raises the price to match.
I forgot the company but around 2015 there was one brand talking up about because of how cheap it was to make it would be a great thing to help with hunger levels in impoverished areas. Just really talking up how they were going to be cheaper than meat. Year later, priced up to match the rest of the brands.