I'm a bit of a suspect, since I'm from Tiflotecnia...
But, let's see:
* Which, if any, support automatic language switching? Using the
CodeFactory bundle 1.1 with NVDA 2021.3.5, neither Eloquence nor
Our Vocalizer works very good in that feature...
And, for people using no latin characters, like chinese, japonese, cyrilic, hebrew or arabic, even on apps not informing the screen reader to change language, our Vocalizer changes automatically based on the type of characters...
* Which tends to be updated for compatibility with new NVDA releases
Ours. We have already the new driver to publish it today or tomorrow...
* What are other differences that should be accounted for in one's decision?
Our technical support is better andfaster...