SPIKE is more expensive (~$150K) than Top attack Tow. Iran’s cost to produce is much cheaper than Israel (Spike) or USA (TOW), but if I had to wager which one Iran produces cheaply it would have to be TOW copies.
If money isn’t an issue then yes Russia could order Spike copy albeit question remains how many can Iran produce. Quantity wise, Iran can flood the battlefield with ToW variants and at a cheaper rate since it’s been building it for so long.
This battlefield is largely forest/farmland with static battle lines. If anything ToW is perfect for this type of area. Yes, ToW is bulkier, but the front lines aren’t moving much these days which means small 3-4 man teams can set up and wait for armour to get in there crosshairs.
That is why a Syrian rebels were so successful using TOW…static battlefield front lines + topography = deadly combo