Hi BV. As a matter of fact, I have one of the new Tamiya cats in the stash for a future comission very soon as an Iranian cat.
From the reviews I have read and looking at the kit , the Tamiya looks to be better detailed and less complex to build compared to the over engineered Hasegawa. The Hasegawa's air intakes and the forward to rear fuselage fit needs lots of attention.
No weapons are included where the Tamiya kit provides them. The parts fit and surface detail is also better than Hasegawa's. Would love to see Tamiya produce a Bobcat and a Super Tomcat with tons of weapons as future releases.
Thanks for looking.