Quick verdict
Go with the boat marine bench seats if you need actual seating and can accept a used item as pictured. Go with the 6" Deck Plate For Boat Marine Stainless Steel Hardware Yacht Ship Accessories if you want a new stainless hardware piece at a much lower price.
Comparison at a glance
| Feature | Boat marine bench seats | 6" Stainless Steel Deck Plate |
|---|---|---|
| Listed price | USD 399.00 | USD 63.75 |
| Condition | Used | New |
| Included | Bench with shelf between positions 2 and 3; items shown in pictures | One 6" / 152mm mirror-polished stainless steel disc |
The bench seats are the higher-priced, larger item. The deck plate is the new, smaller stainless steel component that costs a fraction of the bench seats.
Where each product wins
Boat marine bench seats win when you need seating for passengers and you're okay with a used part. The 6" stainless steel deck plate wins on price, new condition, and corrosion-resistant material.
Product notes
boat marine bench seats

If your boat needs seating, this is the listing that gives you a full place to sit. The unit was removed from a freshwater-only boat and is in good used condition, with a shelf between positions 2 and 3. The $399 price tag reflects a larger, more complete piece than a single hardware component, which matters if you're trying to fill a seating area in one purchase. The trade-off is that you are buying used, so the pictures are your best guide to its current look, and mounting hardware is included only if it appears in the photos. Go this route when you want the substantial item and are comfortable evaluating pre-owned marine parts.
6" Deck Plate For Boat Marine Stainless Steel Hardware Yacht Ship Accessories

For a lower upfront cost, this new 6" deck plate adds a clean stainless steel access point to your boat. It is made from 316 stainless steel with mirror polishing, and the listing gives the inner dimension as 6" / 152mm, so you know the opening you are covering. At $63.75, it is the more budget-conscious pick and comes with one stainless steel disc in the packing list. The limitation is scope: this is a single hardware piece, not a seating surface. If your goal is simply to replace or install a deck access cover with a corrosion-resistant material, this is the more direct choice.
Final choice by use case
Pick the boat marine bench seats for a seating project where you want the complete unit in one purchase. Pick the 6" deck plate for a smaller hardware replacement that needs to be new and corrosion-resistant. In the deck hardware seating covers space, this decision is really about whether you need to fill a seat or cover an access opening.