Yeah technically you are correct, a softmod for the xbox1 I believe can be done without a TSOP flash but I consider TSOP flash a softmod because all it is joining 2 solder points and useing a glitch in 007 video game.
TSOP flash can do everything a modchip can do but the convenience of switching bios' and some other small features but the interface and everything you can do will be the same.
I used to do these for like 25 bucks all the time but to be honest to you it is really really simple to do yourself. All you need is a hex driver, solder iron, memory card, and a legit copy of 007 non platinum edition.
This is all you need: http://forums.xbox-scene.com/index.php?showtopic=165336&referid=&highlight=tsop%20007%20flash%20guide
http://forums.xbox-scene.com/index.php?showtopic=61901
If you want to stop by sometime I can walk you through it, and if I can find my 007 Raincoat memory card you can use that to save you the hassle.