Yes, I get that. But my argument was that where NEXT design has its advantage is in the very early game, where it essentially has a two turn head start compared to other corps. Clearly, economically speaking, EtF overtakes it in the long run but I want to look at the first few turns as this was the point of your article.
For the sake of argument let's say three turns, because over that timescale EtF has made $3 which is enough to rez a reasonable piece of ICE. So comparing the two IDs: NEXT Design has three ICE in play (assuming the best case, but highly likely, scenario) and has drawn three extra cards, whereas EtF has made $3.
Card-for-card and click-for-click EtF must install three ICE to give itself the same level of protection that NEXT already has (gaining the $3). It then has 6 other clicks to spend. Assuming NEXT takes the same 6 actions then it could give itself an identical position to EtF by spending the remaining 3 clicks to gain $1 each. The boards and credit pools now look identical, but NEXT still has three extra cards in hand.
Naturally, it's unlikely that both corps would want to take the same 6 actions. In practice it's likely NEXT is even further ahead because the extra cards afford additional possibilities. Additionally, for my build at least, NEXT has a higher concentration of economy cards than EtF (due to a smaller deck [45 cards] and the bonus draws) so the $ value / card is greater, increasing the value of cards in hand and the draw action.
This is to speak nothing of tempo: NEXT gives you far more chance to minimise losses (agendas and/or $) to early game runs and will likely delay the runner by forcing him to find breakers (plural) before he can achieve anything. An early Siphon for the runner sling-shots his economy while kicking the corp in the groin. I'm not saying NEXT prevents this for sure, but it gives you a far better chance than any other ID. If they're getting into NEXT Design's HQ, they're getting into anyone's; but there are plenty of other HQs they could get into elsewhere while they can't get into ND's.
This is NEXT Design's window. Other corps might suffer a major setback in turn one or two, whereas NEXT is sitting pretty - it has money to spend in turns three and four that other corps have lost. You can talk about credits gained by EtF, but what about the credits not lost by NEXT Design? That's economy too, surely? Those credits then let you do things that another corp would no longer be able to afford, such as scoring an agenda you otherwise might not have,
How many times have you seen the corp install an agenda (either a 3/2 it can't score from hand or a 4/2 advanced once) then get siphoned to the point that they can now no longer afford to finish the agenda and it gets stolen the following turn?
NEXT doesn't make you immune to the Siphon, but it can delay it for long enough to buy you enough tempo to execute your plans. If that agenda happens to be an ABT then you've also just made the runner's task monumentally harder.