Which is better, system integration or information security pre-sale?

The job of system integration engineer is more complicated (I don't know whether you do pre-sales or after-sales, J pre-sales is much better than after-sales), but there are many projects and large projects, so the employment opportunities are wider, and the professional work may not be as good as that of information security pre-sales consulting. However, there are fewer information security pre-sales projects, the threshold is relatively high, and the salary may be high. In the future, employment opportunities will not be as wide as before. Of course, it is also possible to do pre-sales in other industries.