It depends on the role/crew requirements. There might be a second seat on that thing based on the video, but unsure at the moment.
Let's see, there appear to be 6 forward facing guns, a 2 gun turret, 2 Torpedos, and 2 missile racks. While it's a lot of guns, it's not the 4 S3s that the Sabre has. This could be a method of aligning the two a bit more equally.
The two by the cockpit LOOK like S3 CF-227 Panther repeaters
The inside wing weapons look like M4A laser cannons, which are a S2 weapon
The outer wing weapons look like NN-13 Neutron Guns, which are S1.
Neither wing mount looks like it has gimbels. (would be awesome if they were one size up each)
Not really sure about the turret, but that could be another set of M4As S2s, or they could be placeholders
Looks like 2 racks of 3 Marksman I (S1) missiles.
2 anti-capital ship torpedos (look to be similar to the vanguard size-wise)
If these are all controllable by the pilot, this thing will put a serious beatdown on anything in front of it.
Honestly, this looks more like something like a Vanguard competitor, not a Sabre competitor. That said, we are told it's a "Heavy fighter" The Sabre is a fighter, the Super Hornet is a space superiority machine, and the Vanguard is a long range fighter so it could be something in between (size/durability/ of the vanguard, but not the same fuel capacity) or ability to move around, or it could be a longer range, bigger, meaner Super Hornet. (2 S3, 2S2, 2S1, just like the Lightning, but with 2 more on the turret for the Lightning).
I am HOPING it is a longer ranged fighter with 2 people and MAYBE a bed (vanguard competitor) for logging out in but no cargo capacity, However, the video says "no" to my hopes and dreams as I see no passage back inside the vehicle from the pilot seat.
SPECULATION
To me the lack of a bed also puts it as short range vehicle, with maybe a little more Quantum fuel than that Sabre, but not as much as a Freelancer or a Vanguard. That means it will compete with the Bucc., Sabre, and Super Hornet for top dog status as "best space fighter".