The Russian Su-25 Groch, or "Rook" in Russian, and US A-10 Thunderbolt II, or "Warthog," are similar in many ways.
They're both heavily armored. They're both able to execute extremely low-altitude sorties and bombing raids. And they've both even been described as "flying tanks."
Production on the Su-25, which the US calls the "Frogfoot," and the A-10 Warthog both began in the 1970s, and they've since been used quite extensively.
Check out how the two aircraft match up below:
Production on the Su-25 began in 1978, while the A-10 Thunderbolt II was put into production in 1972.

Source: National Interest.
The Su-25 has 10mm to 25mm of armor surrounding the cockpit to protect the pilot while performing low-altitude strafs. Similarly, the A-10 Warthog has 1,200 pounds of titanium armor around the cockpit.

These cockpits have been dubbed "armored bathtubs."
Source: National Interest and Popular Mechanics.
Su-25s generally carry 250 to 500 kilogram bombs and rockets, while the A-10 are often fitted with precision-guided munitions, like Maverick anti-tank missiles.

The Su-25s rockets range from "pods containing dozens of smaller 57- or 80-millimeter rockets, to five-shot 130-millimeter S-13 system, to large singular 240- or 330-millimeter rockets," the National Interest said.
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