These two live in a similar pro-gas lane. The ECHO is the more polished recommendation for this site because the head, torque positioning, and Amazon fit are cleaner. The Shindaiwa is the no-nonsense alternative.
I would pick the ECHO SRM-2620T for most online buyers. I would pick the Shindaiwa T262 if you already like Shindaiwa or have better local support for it.
Best Overall Commercial Gas Pick
ECHO SRM-2620T
A pro-grade high-torque straight-shaft trimmer with a 25.4 cc engine, 2:1 gear reduction, and a Speed-Feed head.
Both are 25.4 cc straight-shaft gas trimmers aimed at serious work. The differences are less about raw displacement and more about head setup, support, and buyer confidence.
Why ECHO gets the edge
The SRM-2620T has the stronger overall package for an online buyer: high-torque positioning, Speed-Feed head, clear specs, and a cleaner affiliate path.
Why Shindaiwa still belongs
Shindaiwa has real credibility with crews. It is the plain-toolbox pick: less flashy, work-focused, and worth considering if the listing and support are good.
Which one should you buy?
Buy ECHO SRM-2620T if
Most buyers shopping online
Fast line loading
High-torque gas trimming
Buy Shindaiwa T262 if
Shindaiwa fans
Simple pro gas setup
Buyers with dealer support nearby
My pick
My pick here is ECHO SRM-2620T. That does not mean the other trimmer is bad. It means ECHO SRM-2620T is the cleaner recommendation for the buyer this comparison is aimed at.