An easy way to find out would be to call Horizon CS and ask. Yuneec made some Blade products but nobody mentions which ones. Spectrum radios came into being before Yuneec started making hobby grade products and it’s possible they use a secondary manufacturer/supplier for their transmitters, as Horizon does the same. Horizon Hobby makes very little, contracting out to numerous jobbers for manufacturing different brand items. Tower/Great Planes does similar.
Yuneec is said to have started making RC model Planes in 1995 and the first electric RTF plane. I find it hard to believe they were not directly involved with Horizon as they have made many breakthroughs themselves. When I started RC about 9 years ago I had been away from this hobby for decades, my only RC experience was with cars and trucks in the 1980's whereas RC planes were very expensive. So when I got back into this 9 years ago I was pleasantly surprised to see what was available especially all the electric powered planes. Naturally as an Electrician I was instantly hooked. I was a Horizon Hobby Fanatic.