That first one is definitely NOT a lavender. Lavenders have a lot of variability when they grow up, but yours won't look like that. He may look similar as a hatchling but will change.
Here's a little "fast fact" history lesson: when lavenders first appeared, they were originally called mochas because as hatchlings they had a somewhat brownish mocha look to them (not all do; again lots of variability with lavenders!). It wasn't until they were adults that they took on a more lavender color. It was realized that mocha was an ill suited name for them as they didn't look anything like mocha color as adults.
So yours may be one of the more mocha looking ones, especially if its a hatchling. But if it is in fact a lavender, it will definitely look lavenderish in color, nothing like the OP's 1st snake.