First of all the storage performance is better in Magento 2. They have used some advanced Technologies like Apache, Symfony, Nginx 1.7 etc. these technologies are there to improve the performance of any software for the platform. In case of Magento, the later version is better in storage performance than the earlier one and that is why if you are facing the storage crunch in the Magento 1 then you must change it to Magento 2.
Magento 2 supports latest PHP versions which were not there in Magento 1. So if you migrate from Magento 1 to Magento 2, then you will get better security as well as the proper speed of online storages. Because it allows the other PHP versions which are a good sign for the security of the platform itself. So in case of security support, Magento 2 is better than Magento 1.
The loading speed is much better in Magento 2 then in Magento 1. In Magento 2, the company has introduced a full page caching option which will make it even easier to load the page. There are 2 editions of Magento which are community and enterprise editions. And this quality is present in both of them. So if you are using anyone addition of Magento 2 then you will get a better loading speed than the previous version for sure.
Magento 2 allows third-party extensions and that is why plugins work much better in this version. So if you need so many login options in your Magento then you must try out-migration Magento 1 to Magento 2. If you want a better backup of data then you must use the backup option before following the migration steps.
Also Read: Magento 2 Extensions, Plugins & Modules
Search Engine Optimization or SEO is a very important aspect right now. Search Engine optimisation is much better in Magento 2 because data migration is done very efficiently in Magento 2 and that is why the Search Engine Optimization is done according to the trend. It is all about bringing the e-commerce website created in Magento 2 up in the first page of Google search results. And that can be done effectively if you use Magento 2.
The theme to Magento 2 is better than Magento 1 because it has a streamlined dashboard which is much more user friendly than the previous one. You will get all the navigation options in a much easier way than before in the latest Magento version. So even if you are new in this platform you will be able to create your e-commerce website without any expert-level help. That is a big up-gradation in the Magento 2 platform than Magento 1.
In the case of pricing, Magento 2 is expensive than Magento 1. So if you are scoring both of them then the score of Magento 2 will get reduce a bit because of its high price. But the price level is completely e understandable because it has a lot of features which were not there in the previous version. So even if the price is more Magento 2 is preferred all the time.
Code migration tool has launched so many features in the latest version of Magento. If you follow the migration process properly then you will be able to launch so many options like showing cumulative detail of the lifetime sales, last order details, best sellers, revenue taxation process, order approval rules and values, shipping and quantity management. These are the newest features added in Magento 2.
So these were the features which will be different in Magento 2 than Magento 1. Mostly in all the cases Magento 2 is much better than the previous version except the pricing feature. So if you are ready to pay a bit extra you can have an awesome platform to develop your eCommerce website efficiently.