Fuel Sending Unit Question

First a big THANKS to REDFISH for helping me diagnose by fuel gauge problem! I am wanting to purchase my 5/16 sending unit for my car today. Summit has a Goodmark for $99.99 and Right Stuff Detailing for $64.95. Has anyone used either of these or recommend another brand or place to purchase a sending unit? Here are photos of them. I am wondering if paying the $99 for the Goodmark is worth it. The Goodmark is on the right.

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