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Left side saw blade: https://homedepot.sjv.io/n1RO6R
Right side saw blade: homedepot.sjv.io/voMye

In this video, John looks at circular saws with blades on the right side, and blades on the left side. He demonstrates the reason you would want to go with one type over the other in this example.

RYOBI introduces the 18V ONE+ 6-1/2 in. Circular Saw, an upgraded tool that provides corded performance in a cordless tool. The 18V ONE+ 6-1/2 in. Circular Saw has a 40% more powerful motor compared to its previous model (P506). The 24 Tooth Ultra-Thin kerf carbide-tipped blade allows for fast, clean cuts. Best of all, it is part of the RYOBI ONE+ System of over 225 Cordless Tools that all work on the same battery platform. Backed by the RYOBI 3-Year Manufacturer's Warranty, the 18V ONE+ Circular Saw includes a 6-1/2 in. 24 Tooth Ultra-Thin kerf carbide-tipped blade, blade wrench, and operator's manual. Battery and charger sold separately.

The RYOBI 18V ONE+ HP Brushless line of products is redefining power and performance. The RYOBI 18V ONE+ HP Brushless 7-1/4 in. Circular Saw features a brushless motor delivers, which 40% faster cutting and over 325 cuts per charge, to outperform your previous tools. The die cast upper guard provides greater durability in any work environment. Use the vacuum dust adaptor to keep your work surface and area clean as you cut, for a quick clean up at the end of the job. Achieve a clean cut every time with adjustable depth gauge and ultimate precision with the bevel gauge. This tool will elevate your ONE+ collection with its accuracy and speed. Best of all, it is part of the RYOBI ONE+ System of over 225 Cordless Tools that all work on the same battery platform. This saw is backed by the RYOBI 3-Year Manufacturer's Warranty and includes the PBLCS300 18V ONE+ HP Brushless 7-1/4 in. Circular Saw, vacuum dust adaptor, 24T thin kerf blade, hex wrench, and operator's manual. Battery and charger sold separately.