More or less both platforms have similar features, however they differ in some key aspects.
Shopify: Shopify charges an additional 2% on every transaction in addition to the Payment Gateway Fees (Usually Razorpay @2% per transaction). In most cases customers end up paying 4% + Taxes per transaction. (~₹4720 / lakh)
Infobahn: InfoBahn does not have any charges on transactions fees. You only pay the payment gateway fees as per your choice of the payment gateway which is usually 2% + Taxes per transaction. (~₹2360 / lakh)
Shopify: Shopify uses a proprietary software, meaning if you ever wanted to leave Shopify you can take your data but not your website. So you will have to re-create your entire website from scratch and re-upload all your products to a new platform.
InfoBahn: InfoBahn uses WooCommerce which means you can take control of your entire site software (codebase). This is especially helpful when you want to built very specific and custom features by hiring a developer. Though a modest fee is applicable for buying the software outright, but having that option is important for the future of your business.
Both services manage the technical aspects like maintenance, security et cetera for you.
Shopify: Shopify offers 7-9 free themes and about 90 paid themes usually costing you $89 to $200/Year.
InfoBahn: Since Infobahn uses WordPress you can use any free or paid WordPress theme on your website. Average cost of premium WordPress theme is $59/Year. For most stores the free themes are usually sufficient.
Both platform offer all essential features such as Inventory Management, Staff Accounts, Order Management, et cetera.
Shopify: While more or less the features are the same, you have to buy additional extensions for COD rules, reports & analytics & returns management.
InfoBahn: COD rules, reports & analytics and product returns management come as core features with all plans. Since InfoBahn uses WooCommerce, WooCommerce has 3 times more extensions than Shopify.
Apps / Extensions
While both Shopify and InfoBahn E-Commerce offer free & paid extensions the pricing could be significantly differ.
Shopify: The cost of Paid Shopify Apps could range between $5 – $99 per month. A lot of widely used extensions fall in the range of $15 – $25 per month.
InfoBahn: Since InfoBahn uses WooCommerce the cost of WooCommerce extensions could range between $20 – $300 per year. A lot of widely used extension fall in the range of $39 – $99 dollars per year.
Shopify: The basic Shopify plan starts at ~₹2200 ($29) per month + ~4% Per Transaction
Summary: ~₹2200 + ~₹4000 per lakh + taxes
InfoBahn: The basic InfoBahn plan starts at ₹1249 per month + ~1.5% Per Transaction
Summary: ~₹1250 + ~₹1500 per lakh + taxes
In addition to that Shopify extensions are more expensive than InfoBahn (WooCommerce) extensions.
Shopify is a good software but it could be expensive in the long run, in terms of transaction fee, premium themes and Shopify apps.