Ten years have passed after the last financial and economic crisis. As such, it is a good time to assess and to be reminded of the lessons that were learned and, more importantly, the lessons that were not learned, when it comes to the post-crisis reform of EU’s financial regulatory system. The current article aims at identifying the extent to which the Solvency II directive which codifies and harmonizes regulation regarding EU’s largest institutional investors, i.e. insurance undertakings, imitates its source of inspiration, Basel II, in order to introduce a critical way of thinking about the identified level of imitation. The main argument of this contribution is that since Solvency II is supposed to be revised this year, the EU legislator should embrace this opportunity to abstain from treating insurance undertakings as banks regulated under Basel II since Basel II did not prevent the financial and economic crisis of 2008 and arguably even added fuel to the fire. Moreover, the current article presents several other arguments as to why the regulatory model of Basel II is by no means a danger-free inspirational source for regulating insurance undertakings.