Infinity vs Whiteside for Flattening End Grain

My goal was to determine which of these two high-quality router bits would provide the smoothest outcome when planing end grain, especially end grain that's prone to fuzziness and tear-out. The router-sled method is useful for flattening large wood cookies, end-grain cutting boards, log-bench ends, or anything else with a lot of end-grain surface area that might not be suitable for a thickness planer. The smoother the result from the router bit, the less time you'll spend hand-planing, scraping, and even worse, sanding.

I started with the Whiteside bit, and later picked up the Infinity bit to see if it would give better results with its upshear/downshear design. I thought about including some very-low-cost bits as well just for kicks, but decided that would only degrade the overall results - The cheapest bits are cheap for a reason and aren't a good long-term value. I also thought about including some more expensive options, but this is coming out of my pocket, so we'll stick with these two for now.

You can skip to the end of the video to see the conclusion, but I usually try to show how I arrived at my conclusion so that you're not just taking the word of some dude on the internet.

You can find pictures of stuff that I make on Instagram:
  / thesnekkershow  

These are the two bits compared in this video:
Whiteside 6220 Spoilboard Bit: https://amzn.to/38WEqam
Infinity 52-506 Mega Dado & Planer Bit: https://amzn.to/3goSb4J

This is the router I used:
DeWalt DW618 2 1/4 HP Router: https://amzn.to/39HZYqz

If I were to buy or test another bit, it would probably be this one:
Amana RC-2250 Spoilboard Bit: https://amzn.to/3bPFIFX

This video is not sponsored. I paid for everything and used my own time. As an Amazon Associate, I may earn a small commission if you use the Amazon links to make a purchase.