Sure, the Sassanid attitudes varied and were sometimes both opportunistic or out of realpolitik..
Oh, sure. My point was to say Sassanids had the same motivation against Jews than Romans.
That said we have documentation on this situation : contemporary (the Paschale Chronicle mention a Jewish uprising, while in an hagiographic way)
Sebeos said:
[95] Then the entire country of Palestine willingly submitted to the king of kings. The remnants of the Hebrew people especially rebelled from the Christians and taking in hand their native zeal [The translation is uncertain: ew arheal i dzerhn znaxandz hayreni, perhaps "manifesting desire for a/their homeland"] wrought very damaging slaughters among the multitude of believers.
Going [to the Iranians], [the Jews] united with them. At that time, the army of the king of Iran was stationed at Caesarea in Palestine. Their general was named Rhazmiozan (that is, Xorheam). He spoke with [the inhabitants of] Jerusalem so that they submit voluntarilly and be kept in peace and prosperity.
It hint to an jewish autonomy (even if relative) inside Sassanid Empire
After a Christian riot and the takeover of Jerusalem by Khorso II, however
Sebeos said:
He commanded that the Jews [97] be driven from the city, and the king's order was quickly implemented, with great urgency.
As other reasons, distrust of Palestinian Jews toward the Shah, as he was accused to have killed a jewish leader of his army, probably in the light of previous rulers persecutions.
The mentions are short indeed, but contemporary enough to be considered as valid.
From the Sassanid perspective, it made political sense to reach some accommodation with the local majority of Christians in Jerusalem. The massacre of Jews took place after Khosru was forced to retreat from the Levant by Heraclius' armies. The article doesn't make that point clear.
Other persecutions against Jews happened during Sassanid rule before that.
"Peroz the evil" is another exemple on how rulers didn't exactly favoured Jews :
the article (or
this one)of the Jewish Encyclopedy makes that relativly clear, and the emigration of jewish communauties in Central Asia (in Afghanistan, by exemple) is commonly identified with
this period
If we are talking about the Sassanid period as a whole in its attitudes and policies towards the Jews in its domain, it was primarily benign neglect with periods of persecution and promotion but neither never really implemented on an Empire-wide scale.
As said above, I don't think that Sassanids would be willingly as persecutive than Byzantines, but I just don't think either that they would care enough to repeal Roman legislation.
Something comparable to what existed in Western Europe at this time would probably give a good idea.
But things were better, even far better than what the Jews experienced under the late ERE
OTL, the periods with actual favouring of Jews before Christians were at best episodics.
The risk of an autonomous "national" province in the empire was eventually too great of risk to be taken for too long : Romans tried so, it backfired with multiple revolts. I simply don't see Persians doing much more while they already have an history of persecution of their own.