2 mins on google image search would give you these answers
Grumman OV1 Mohawk
, is a military observation aircraft designed for battlefield surveillance for the US Army (the only airplane designed solely
for the army since the services split in 1947). The prototype (YAO-1AF) first flew on April 14, 1959, and the aircraft served in the U.S. Army from
1959 to 1996.
Apart from performing traditional visual and photo-reconnaissance, the Mohawk could be equipped with SLAR (Side-Looking Airborne Radar) or IR
Air & Space Magazine article on OV 1 Mohawk
Role. Battlefield surveillance.
Armament. Normally unarmed (capable of carrying minigun, bombs, and rockets).
Dimensions. Length: 41 ft (12.5 m). Span: 48 ft (14.64 m).
Wings. Mid-mounted and equally tapered with blunt tips. Positive slant.
Engine(s). Two turboprops mounted on top of and extending beyond wings’leading edges.
Fuselage. Club-shaped and tapered to rear section. Blunt nose. Two-seat, stepped-up cockpit. When installed, SLAR is prominently exposed beneath the
right side and forward part of the body.
Tail. Triple fins are equally tapered. Outer fins extend above and below the flat. Center fin appears taller. Flats are tapered with a positive slant.
Rockwell International OV10 Bronco
, is a turboprop-driven light attack and cargo aircraft. It was developed in the 1960s as a special aircraft
for COIN (counter insurgency) combat, developed for USMC, US Navy (Light Attack Squadron) and USAF (in forward air control role). Although it is a
fixed-wing aircraft, its mission capabilities resemble a fast, long-range, inexpensive and reliable ultra-heavy attack helicopter. It flies at 350 mph
(560 km/h), carries 3 tons of external munitions, and easily loiters for 3 or more hours. It is prized for its versatility, redundancy, load, wide
field of view, short-field ability, low operational costs and ease of maintenance. In most cases, it flies acceptably on a single engine. In service,
it was used primarily a light attack and Forward Air Controller aircraft, and rarely if ever as a transport.
Role. Armed reconnaissance; forward air control; quick-response, ground-support.
Armament. Machine guns, rockets, bombs.
Dimensions. Length: 41 ft, 7 in (12.70 m). Span: 40 ft (12.20 m).
Wings. High-mounted and rectangular with square tips.
Engine(s). Two turboprops in booms under wings.
Fuselage. Short and oval with glassed-in, stepped canopy.
Tail. Twin tail booms with swept-back fin on each boom. Rectangular tail flat that connects the tail fins at the top.
Wikipedia detailed info on OV10 Bronco
They are actually quite different.