UK: Scotland has control over 9% of their powers, meaning, English voters have the outright say over Scottish voters, even if the law/ruling does not affect England; whilst having 20% of powers semi-devolved, where MSPs vote with English MPs, however, often are voted against. An example of this is Trident.
EU: Scotland would take part in a consensus proportional representation vote where no one country has absolute say, with all non-fixture bills having a VETO option, whereby the Scottish representatives can opt out of following. An example of this is British reps opting out of the Schengen Area and joining the Euro-Zone. Scotland would control well over 95% of all powers and laws; with the rest being semi-devolved through the EU.
UK: Scotland has a voting age of 16 with the AMS system, whilst England uses the FPTP system and all other countries having a voting age of 18; meaning in GEs, not all eligible Scottish voters will be allowed to vote. All Scottish representatives for Parliament is elected, whilst in the HoL, it is an aristocrat oligarchy, whereby, you get a seat by either being appointed the position and thus swinging bias for the party that put you there, or inherit the seat due to being wealthy enough and thus have their own personal interests at heart. The HoL is undemocratic, and can vote for and change laws as they please without any repercussions, with strong bias for the leading party.
EU: ALL EU reps that debate laws and regulations are elected, this is through the d'Hondt system for Scotland. These reps also must file under no form of corruption investigation and have equal say to one another through proportional representation. With consensus and opt-outs, it means countries like Germany does not have absolute control due to having a high population, whilst countries like Malta get no say.
UK: Scotland had a tax revenue in 2015 of ~£56bn but only had a budget of ~£42bn, so this would be a surplus of ~£14bn; however, England required ~£30bn from Scottish tax revenue for subsidies and to make up for budget costs, and as a result, Scotland ended up with a deficit of ~£15bn, to which, England is not paying any money towards.
EU: This means, minus this subsidy to England and UKMF explained in economy; Scotland would have a much larger tax surplus, and in fact, would not only be able to pay off its external debt of ~£91bn [as of 2015], whilst increasing the budget and/or even reducing taxes. Scotland would no longer have to pay off English debt nor pay so much of its economy to England unfairly.