You answered your own question: they differ in price and softness. There's a "basic TP" niche and a "premium TP" niche -- and maybe a couple more, but not many.

Okay, you say, since no two products are exactly identical, how is my talk of niches not vacuous? Because it's not enough for the products not to be identical: they must be differentiated in the mind of the market. That is, the differences must matter to at least some part of the market. If you have a small market share, and you are unable to differentiate your product from its competition in some way -- price or features or both -- your market share will go to zero. The world is littered with examples; I'm sure you can think of plenty yourself.

Ask any angel or VC you know what they think of a business plan that proposes to capture a small fraction of a huge market, without laying out a viable marketing plan for differentiating the product.