Okay. The VEG fert has a lot of N, the first number, because plants growing lots of shoots and leaves need plenty of Nitrogen compared to other components. They still need Phosphorous (P, second number) for healthy roots and Potassium (K, last number) for a strong immune system.
When you switch to flower, you want to suppress the plant's ability to make lots of leaves and chlorophyll, and so you cut the N number down by at least half. If you start with a veg fert that has N=10, go to a flower fert with N=5 or less. Then give them extra P and K, whcih they need for sexual reproduction.
Your proposed bloom fert would have a little too much N, proportionally, and not enough P. Is there another one available with a higher MIDDLE number?