Following up on this.
Received the fork springs, as others have noted, they're a touch longer, but here's a photo for those curious.
Installation needs a touch more muscle to get the cap wrestled down but nothing out of the ordinary for fork springs.
Bouncing the suspension in the garage there's an immediately noticeable difference. They're definitely
stiffer, but they also eliminate nearly all sag. Seriously, from fully extended with the wheel off the ground, to just standing the bike upright, there's probably 1-3mm of static sag, and with me on the bike there's probably 5-8mm or rider sag (I didn't actually measure since it was minuscule). Definitely not what I wanted to see there, but taking a ride proved that it was a worthwhile investment.
Overall the bike handles MUCH better. Far more composed in the corners, not such a willowy mess. The forks now better match the rear shocks and overall the ride has greatly improved. It's not overly harsh over bumps either, in my opinion. But, I am used to pretty taut suspension on my modern sport bikes. I wouldn't call it plush, but it's far from harsh. It's still plenty comfy.
And, the bike doesn't feel like it's going to bottom out as much, although it did still happen. But, then again, my testing methods are probably a bit aggressive
For around $50 and 30 minutes of my time I'm quite pleased with the improvement. Could it be better? Absolutely, but it's going to take more money to achieve it and I'm satisfied to run it as is for the time being.