you can.
if the last three digits are below 250 it's one of the kits from the first batch.
if the number is between 250 & 500 it's from the "second" batch of cars, but still "early" ones.
anything after that, and it's a "late" version, but it will definately include all the "in-progress" upgrades, such as collars around the drive pinions, stainless steering link, upgraded (toughened) front gearbox top, arctic white wheels and improved motor clamp.
The initial batch had none of those improved items and a carbon fibre steering link that was .25mm thick. oh, how we laughed
The second batch, depending upon how late in the numbers you get had some, if not all of the above mentioned parts, but there doesn't appear to be a uniform release.
Indeed, in the first batches of X10 some had anodised motor mounts that were black, others appeared "natural".