and another question is that the PVC floor plank is much heavier than the vinyl floor ,so the price is more expensive than that ,the price is nearly $2.8 per sq.ft ,but it's hard ,not soft as the vinyl floor tile , I means is it too expensive ?

I vote for floating, click, wood look, luxury vinyl plank. I especially like the style with knots and chatter marks. Lay it throughout the whole house, on the diagonal, with no thresh holds. That's what I did. I can clean the entire house in approximately five minutes with an electric leaf blower. Porcelain tile is more durable however it is more expensive to buy, more expensive to install, and more expensive to uninstall. Also, some tile is extremely slippery when wet whereas wood grain LVP is not slippery at all. Five years later I am happier than ever I chose grey driftwood luxury vinyl plank for a house with dogs, kids, beach sand, and lots of wet feet. If the house gets inundated from storm surge and ocean water gets inside, I can unclick the LVP, clean and dry the subfloor, and then reinstall the same LVP and it will look as good as new.

If you can find the same vinyl, then go for it. I'm assuming you will have to do something to the stairs. That can get tricky if they were covered in carpet. Make sure you can get all the right trim for the stairs (nosing) for the vinyl before you make this decision. If your vinyl flooring is more than 2 years old, you may not find it anymore. Most of these man-made products have a shelf life of (around) 2 years. After that they are impossible to find.

@V M sorry, just seeing your post above. We are just now finally breaking ground on our home so I don't have pics of the flooring to show you from my house. I will come back and post when I do but that will be some months from now. But we are paying, I think, 15K for our Multi-Length Rigid Core SPC floors in color Sandhill. Our house will be 2975 sf and this floor covering will be throughout the home, except in 3 of the full baths and the utility room. I'm not exactly sure how many square feet that leaves but hopefully you can do some rough math. Everything goes through my builder so I don't have an exact price per square foot to provide you. I also am not sure if this includes labor to install.